Unhandled Exception Global Handler for OWIN / Katana?

Question

What is the proper way to implement a global Exception catcher-handler in a Katana (OWIN) implementation?

In a self-hosted OWIN/Katana implementation running as an A

Answer 1

Try this:

public class CustomExceptionHandler : IExceptionHandler
{    
    public Task HandleAsync(ExceptionHandlerContext context, CancellationToken cancellationToken)
    {
      // Perform some form of logging

      context.Result = new ResponseMessageResult(new HttpResponseMessage
      {
        Content = new StringContent("An unexpected error occurred"),
        StatusCode = HttpStatusCode.InternalServerError
      });

      return Task.FromResult(0);
    }
}

And at startup:

public void Configuration(IAppBuilder app)
{
  var config = new HttpConfiguration();

  config.Services.Replace(typeof(IExceptionHandler), new CustomExceptionHandler());
}